package com.media.utils;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Path;
import android.os.Build;
import android.util.AttributeSet;
import android.view.View;

import androidx.appcompat.widget.AppCompatImageView;

import com.media.R;


public class MediaCornerImageView extends AppCompatImageView {
  private float width, height;
  private int defaultRadius = 0;
  private int radius;
  private int leftTopRadius;
  private int rightTopRadius;
  private int rightBottomRadius;
  private int leftBottomRadius;


  public MediaCornerImageView(Context context) {
    this(context, null);
    init(context, null);
  }

  public MediaCornerImageView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
    init(context, attrs);
  }

  public MediaCornerImageView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init(context, attrs);
  }

  private void init(Context context, AttributeSet attrs) {
    if (Build.VERSION.SDK_INT < 18) {
      setLayerType(View.LAYER_TYPE_SOFTWARE, null);
    }
    // 读取配置
    TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.RoundCornerImageView);
    radius = array.getDimensionPixelOffset(R.styleable.RoundCornerImageView_radius, defaultRadius);
    leftTopRadius = array.getDimensionPixelOffset(R.styleable.RoundCornerImageView_left_top_radius, defaultRadius);
    rightTopRadius = array.getDimensionPixelOffset(R.styleable.RoundCornerImageView_right_top_radius, defaultRadius);
    rightBottomRadius = array.getDimensionPixelOffset(R.styleable.RoundCornerImageView_right_bottom_radius, defaultRadius);
    leftBottomRadius = array.getDimensionPixelOffset(R.styleable.RoundCornerImageView_left_bottom_radius, defaultRadius);


    //如果四个角的值没有设置，那么就使用通用的radius的值。
    if (defaultRadius == leftTopRadius) {
      leftTopRadius = radius;
    }
    if (defaultRadius == rightTopRadius) {
      rightTopRadius = radius;
    }
    if (defaultRadius == rightBottomRadius) {
      rightBottomRadius = radius;
    }
    if (defaultRadius == leftBottomRadius) {
      leftBottomRadius = radius;
    }
    array.recycle();
  }


  @Override
  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    super.onLayout(changed, left, top, right, bottom);
    width = getWidth();
    height = getHeight();
  }

  @Override
  protected void onDraw(Canvas canvas) {
    //这里做下判断，只有图片的宽高大于设置的圆角距离的时候才进行裁剪
    int maxLeft = Math.max(leftTopRadius, leftBottomRadius);
    int maxRight = Math.max(rightTopRadius, rightBottomRadius);
    int minWidth = maxLeft + maxRight;
    int maxTop = Math.max(leftTopRadius, rightTopRadius);
    int maxBottom = Math.max(leftBottomRadius, rightBottomRadius);
    int minHeight = maxTop + maxBottom;
    if (width >= minWidth && height > minHeight) {
      Path path = new Path();
      //四个角：右上，右下，左下，左上
      path.moveTo(leftTopRadius, 0);
      path.lineTo(width - rightTopRadius, 0);
      path.quadTo(width, 0, width, rightTopRadius);

      path.lineTo(width, height - rightBottomRadius);
      path.quadTo(width, height, width - rightBottomRadius, height);

      path.lineTo(leftBottomRadius, height);
      path.quadTo(0, height, 0, height - leftBottomRadius);

      path.lineTo(0, leftTopRadius);
      path.quadTo(0, 0, leftTopRadius, 0);

      canvas.clipPath(path);
    }
    super.onDraw(canvas);
  }

}